Optical pickup having plural optical sources and plural optical

Details Optical pickup having plural optical sources and plural optical Optical pickup having plural optical sources and plural optical

1997-06-05

1999-08-03

Hindi, Nabil

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369 94, 369 4437, G11B 700

Patent

active

059334010

ABSTRACT:
An optical pickup capable of compatibly adopting disks of different formats which are placed in an optical player includes a first optical source for emitting light having a predetermined wavelength, a second optical source for emitting light having a wavelength different from that of light emitted from the first optical source, an objective lens for focusing light emitted from the respective first and second optical sources on a recording medium placed in the optical player, a light path changing unit disposed on a light path between the first and second optical sources and the objective lens for changing the traveling path of incident light, a first optical detector for receiving light emitted from the first optical source and is incident via the recording medium and the light path changing unit, and a second optical detector for receiving light emitted from the second optical source and is incident via the recording medium and the light path changing unit.

REFERENCES:
patent: 5636190 (1997-06-01), Choi
patent: 5696749 (1997-12-01), Brazas, Jr. et al.
patent: 5703856 (1997-12-01), Hayashi et al.
patent: 5717674 (1998-02-01), Mori et al.
patent: 5768221 (1998-06-01), Kasami et al.

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